Crossing motion pirn winding machine



March 26, 1940.

C. MlESCH CROSSING MOTION PIRN WINDING MACHINE Filed March 23, 1938 3 Sheets-Sheet 1 com \le HiQSCh \NVENT'OR fix, n-Ty.

March 26, 1940. c. MIESCH CROSSING MOTION PIRN WINDING MACHINE Filed March 25, 1938 3 Sheets-Sheet 2 camina WQ March 26, 1940. c. MlESCH CROSSING MOTION PIRN WINDING MACflINE Filed March 23, 1938 3 Sheets-Sheet 5 \NVENTQE ATTQ Patcnted'Mar. 26, 1940.

PATENT "orator:

CROSSING MOTION PIBN WINDING MACHINE Camille Mieach. 'lhann, Rant-Rhine, France, as-

signor atone-halite Etabiiuements Weco S. A. B. L., Thann. Kant-Rhine, France Application March 23, 1988, Serial No. 197,521 lnlrancelnly'l, 193'! This invention relates to crossing motion pirn winding machines.

In the yarn winding machines termed winding I frames, it is known, for guiding the yarn, to use instead of a yarn guide having a traversing movement, a roller or drum provided at its periphery with crossed helical grooves or ribs, said roller or drum having only a rotary movement about its axis while the yarn is given a crossing motion by it)- said helical grooves or ribs. The winding frames provided with such rollers or drums, owing to the elimination of any jerks, permit of obtaining yarn speeds which are by farhigher than the speeds which may be'obtained with traversing yarn- 15 guides.

The present invention consists of a crossing motion pirn winding machine in which the guiding of the yarn is effected by such a roller or drum the periphery of which is formed with crossed helical grooves or ribs, means being provided for imparting to the said roller or drum a longitudinal movement of translation relatively to the pirn.

It is thus possible to obtain pirns the length of which is equal to the sum of the axial length of the helical grooves or ribs of the roller, and of the amount of its relative longitudinal movement.

The relative longitudinal movement of the roller may be regular or irregular, it may also be combined with an additional relative traversing movement of small amplitude which provides for a better securing of the yarn to the pirn.

Obviously, the movement of translation can be imparted either to the yarn-guiding roller, the shaft of the pirn being stationary longitudinally, or to the said pirn, the roller being stationary longitudinally or to both of these.

The yarn-guiding roller is preferably given a tapered form, so as to provide for a better guiding of the yarn at the small end of the pirn.

In the accompanying drawings, which are given solely by way of example: 3

Fig. 1 is an elevational view, with a section on the line l-l of Fig. 2, of a machinein conformity to the invention,- comprising two winding posts.

Fig. 2 is a corresponding plan view.

Fig. 3 is a partial front view of the screw and nut device of the feeding mechanism of the yarnguidlng roller.

Fig. 4 is a vertical section on the line 4-4 of Fig. 3.

Fig. 5 is a partial view of the machine according to-Flg. 1, showing a tapered guiderroller.

4 Claims. (CL 242-31) Figs. 6 and 7 show sections on line. 0-0 and |--'I oi Fig. 5. Fig. 8 illustrates the application of the tapered guide roller in the case in which it is stationary longitudinally.

- Referring now to Figs. 1 to 4, the machine comprises two winding posts, that is, it can receive two tubes l and I, each of which is mounted betweenthe centre 2 of a shaft 2 or 3' and an elastic back centre 4. P 1

- The shafts 3 and 3', which are parallel,"are rotatable in the opposite side-walls of a casing 5. Beyond said casing, the shafts I and 3 are each provided with a driving pulley 6. The yarn F (Fig. l) is guided, for each of the 15 bobbins I, l' by a yarn guide which consists, as known per se, of a roller I, 1 having helical yarn-guiding edges illustrated in the form of ribs 8, 8. According to the present invention, the axial length l of the ribs 8, l is much less than 20 the length L of the cylindrical or double-tapered package 9, 9' to be obtained upon the pirns I, I.

Each guide-roller I, 1" is slidably keyed to a shaft III or Iii by which it is rotated. The said shaft is rotatable in the casing 5 and is driven 25 from the conjugated shaft 3 or 3" carrying the pirn bya pair of' gear-wheeels ll, I2.

Each roller 1,1 can be given a movement of translation along its driving shaft by means or a fork l3 secured to a rod H which is slidable in 30 the casing 5. The two rods H are connected together-by a cross-piece l5, so that it is simply necessary to give to the said cross-piece a movement of translation in the direction of the arrow f, or in the opposite direction, in order to dis- 3 place the guide rollers I, 'I.

In the cross-piece i5 is rotatably mounted, between two thrust-bearings l8 and I! (Fig. 2), the end of a screw l8. I

The said screw passes through an oblong apero ture is (Figs; 3,4) in'a plate 20 which is vertically slidable in a guide 2| formed in amember 22. The upper part I! of the aperture" in the said plate is tapped, so that when the said plate is lowered by a-spring 23, the screw" wlli'mesh 45 with said plate. A rod 24 secured to' the plate 20 serves to raise this latter against the'spring 23, thus uncoupling the. screw ll.

It.will be appreciated that if the member 22 is stationary in space and the plate 20 is lowered by 50 the spring 23, and the screw I8 is rotated, the latterwill be automatically given a longitudinal movement of translation, as it is screwed into the tapped part I8.

Preferably the plate. 20 is moreover given, by 5 means of the member 22, a rapid reciprocating movement of small extent, on the longitudinal axis of the screw l8, this movement being superposed upon the above-mentioned longitudinal movement of the said screw, and hence of the cross-piece I5 and finally of the guide rollers 1, 1. This auxiliary movement is imparted to the member 22 which forms a strap (Fig. 4) for instance by means of an eccentric 25. Said eccentric is keyed to a transverse shaft 25, to which is keyed a worm-wheel 21 meshing with a worm 28 keyed to the shaft l8 rotating the guide roller 7. If desired, said auxiliary reciprocating movement may be eliminated by disengaging the eccentric 25 from member 22 or by providing for a free rotation of shaft 26 within the eccentric 25.

To the shaft 26 is keyed a disc 23 carrying a tappet 30 which, at every revolution of the shaft in the direction of the arrow f" (Fig. 1) will raise, in the direction of the arrow 1 a lever 3| which is pivoted on a shaft 32. The lever 3| is urged in the contrary direction to the arrow 1 by its own weight, assisted or not by a spring. The lever 3| is connected to the shaft 32 through a one way clutch comprising a pawl 34 pivoted at 33 to the lever 3| and which at each oscillation of the lever in the direction of the arrow 1 rotates a ratchet-wheel 35 which is keyed to the shaft 32, thus rotating the said shaft in the direction of the arrow 1 through an angle depend ing upon the amount of oscillation of the lever 3|. During the return stroke of the lever 3|, the pawl 34 will slide upon the teeth of the wheel 35 without rotating the latter.

The amplitude of the oscillations of the said lever and hence of the impulses imparted to the wheel 35 and the shaft 32 can be adjusted so as to permit of varying the speed ratio between shaft 26 and 32. For this purpose there is provided an adjustable stop 36 on which the'lever 3| comes to rest when it is released by the tappet 30 (Fig. 2). The stop 36 is mounted on a gear-wheel 31 (Fig. 2) which is loose on the shaft 26 and the angular position of which may be adjusted by an operating knob 38 which is movable in front of a fixed scale 39. The knob 38 is keyed to a sleeve 40 rotatable on the shaft 32, and to the said sleeve is keyed a pinion 4| meshing with a toothed ring 31.

To the shaft 32 the rotation of which, by impulses of adjustable amplitude, is effected by the mechanism above described, is keyed a worm 42 meshing with a worm-wheel 43 which is engaged in a fixed forked bracket 44 and is slidably keyed to an extended part Ili not threaded, of the screw l8.

The operation of the machine is as follows. The pirn is directly rotated by the shaft 3, and this latter, by the gearing H and I2, rotates the shaft l0 and hence the guide roller 1.

If it is desired to operate the second pirn I, its shaft 3 is also rotated, and this latter, through the corresponding gearing H and 2, will actuate the shaft II) of the guide roller 1.

The shaft III of the guide roller 1 drives through the gearing 28, 21 the shaft 26, which, by means of the tappet 30, the lever 3| and the pawl 34, moves the shaft 32 forward by successive impulses, in the direction of the arrow f. This shaft 32-through the gear connection 42, 43 rotates the screw |8 which thus is screwed into the threaded part l9 of the plate 20 and moves forward in the direction of the arrow f (Fig. 1). At the same time, the eccentric 25 gives it rapid reciprocating impulses of small extent, which further the winding of the yarn upon the pirns I, I

when the yarn commences its winding, each guide roller has the position shown at 1'; the position shown in full lines in the figures corresponds to the positon at the end of the operation.

In order to bring the guide-roller to its initial position 1', it is simply necessary to release the screw 8 from the tapped part Iii by raising the member 20 by means of its rod 24. The screw I8 is released, and by acting upon the cross-piece l5, it can be moved to the left together with its guide rollers 1 and 1.

The feeding speed of the guide-rollers is regulated according to the desired diameter of the pirns by means of the knob 38, which permits of varying the extent of the oscillations of the lever 3| by changing its idle position.

The stopping of the machine at the end of each operative movement may be effected by hand, or automaticaly by any suitable electric or electromechanical uncoupling means which are in current use.

The said machine, which is of a simple construction and of a most approved operation, is capable of filling pirns having a length L which is greater than the length l of the guide roller or rollers, at a very high speed, such as cannot be obtained with the usual yarn guides.

Instead of employing a cylindrical guide-roller as shown in Figs. 1 to 4, it may be of advantage to employ a tapered guide roller as shown at 52 in Figs. 5 to 7.

As above the yarn F passes over said roller 52 which rotates for instance in the direction of the arrow 1 and is wound on a tube rotating in the opposite direction (arrow 1 in order to form a pirn 9. The roller 52 has a tapered shape, and comprises helical ribs or grooves 8 having right and left hand pitches, these being crossed at 55. The ribs or grooves 8, the axial length of which is l, impart to the yarn a traversing movement before it is wound on the tube in order to form the pirn 3.

The pirn is obtained by the superposition, with a longitudinal spacing, of layers each of which consists of a certain number of turns of yarn. The pirn commences with a tapered part (Fig. 5) formed by the gradual spacing of the first layers; the mean part consists of parallel tapered layers 53, and whatever be its length, it is terminated by a second tapered part having an angle a: at the apex.

The guide roller is given an angle at the apex which is practically equal to :r. The said roller is positioned so that its taper will be contrary to the taper of the layers 53 of the pirn.

It will be noted that during the whole period of formation of each layer 53 of the pirn from the point a, at the moment at which the yarn is wound on the large diameter D of the pirn, as far as the tip of the pirn where the yarn is wound on the small diameter d of the pirn, the guiding point for the yarn is situated at all times quite near the winding point (see op Fig. 6 and rs Fig. '7), owing to the tapered form of the roller. On the contrary, with a cylindrical roller, the distance between the guiding point and the winding point of the yarn increases according as the winding proceeds to the end of the pirn. The yarn is not properly guided till to the end of its course and it will form a small edge at the tip of the pirn. When the yarn is subsequently unwound, for weaving purposes, it may happen that two or three spiral turns of this edge may be detached at the same time and may make the fabric defective. Thus the said drawback is obviated by the tapered shape of the roller according to the present invention.

The tapered roller has further the advantage of providing a compensation for the tension of the yarn. In fact, when the yarn is wound ac-.

cording to the large diameter D of the pirn, its

linear'speed is greater than when it is wound according to the small diameter d. Thus the tension of the yarn is greater for the large diameter than for the small diameter for a constant braking of the yarn, but owing to the tapered form of the roller, the length of the yarn in contact with the guide roller, and hence the braking, will be greater when the yarn is wound according to the small diameter of the pirn than when it is wound according to the large diameter (qr Fig. 7 is greater than no Fig. 6) and this will provide for a compensation, and the tension of the yarn will vary to a much less degree. On the contrary, such is not the case with a cylindrical roller, as in this case the length of the yarn in contact with the guide roller, and hence the braking, will diminish at the same time as the diameter of the winding upon the pirn, so that the braking will be less and less eflective according as the yarn comes near the small diameter of the winding, whilst the reverse should take place.

Obviously, the tapered roller may be used without any longitudinal movement, it the length of the bobbin should be equal to I (Fig. 5

It is evident that the invention is not limited to the embodiments herein described and represented, which are given solely by way of example.

Having now described my invention what I claim as new and desire to secure by Letters Patent is:

1. A crossing motion pirn winding machine comprising in combination a pirn tube supporting spindle, a yarn guiding roller the periphery of which is formed with yarn guiding edges disposed on two helices of contrary directions, driving means adapted to rotate said pirn tube supporting spindle and said roller, a screw threaded rod, a nut, means adapted to bring said nut in or out of screw engagement with said rod, connecting means between said rod and said roller for moving said roller longitudinally with said rod, drivadjustable stop adapted to limit said return ing means adapted to rotate said rod and means adapted to impart to said nut a reciprocating movement of small amplitude in a direction parallel with said rod, said last mentioned means including an eccentric the axis of which is dis- 5 posed transversely relatively to said rod, a slot formed in said nut and in which fits said eccentric and means adapted to rotate said eccentric.

2. A crossing motion pirn winding machine comprising in combination a pirn tube supporting l0 spindle, a yarn guiding roller the periphery of which is formed with yarn guiding edges disposed on two helices of contrary directions, driving means adapted to positively rotate said pirn tube supporting spindle and said roller, a nut, a 15 screw threaded rod engaging said nut, connecting means between said rod and said roller for moving said roller longitudinally with said rod and means adapted to rotate said rod including a shaft rotating ata constant speed, a second shaft, transmission means having a variable speed ratio between said shafts and a gear connection between said second shaft and said rod.

3. A crossing motion pirn winding machine as claimed in claim 2, in which said transmission means include a lever loosely mounted on said driven shaft, a one way clutch between said lever and said driven shaft, an eccentric tappet carried by said driving shaft and adapted to engage said lever during a portion of its circular path 30 so as to raise and rotate itthrough an angle in the direction for which said one way clutch is operative, whilesaid lever is unclutched from said driven shaft during its return stroke, and an rotates, means for rotating said spindle and posi- 45 tive traon means between said spindle and said roller and out of contact with the yarn for rotating said roller and feeding it longitudinally relative to said spindle as the latter is rotated.

0mm mason. 5o 

